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发明名称
Procédé pour relier une ébauche en acier à un corps de trépan consistant en une masse de poudre de tungstène ou poudre de carbure de tungstène frittée, et trépan au diamant produit par ce procédé
摘要
申请公布号
FR1505262(A)
申请公布日期
1967.12.08
申请号
FR19660088260
申请日期
1966.12.21
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ
发明人
分类号
B23K35/30;C09J163/00;E21B10/46
主分类号
B23K35/30
代理机构
代理人
主权项
地址
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